Histological study on the leaf rehydration of desiccation-tolerant plant Xerophyta scabrida
  • Metaadatok
Tartalom: http://real.mtak.hu/34720/
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published




Type = Article
Cím:
Histological study on the leaf rehydration of desiccation-tolerant plant Xerophyta scabrida
Létrehozó:
PĂ©li, Evelin RamĂłna
Nagy-DĂ©ri, Helga
Nagy, Zoltán
Kiadó:
ELSEVIER
Dátum:
2015-09
Téma:
QK10 Plant physiology / növényélettan
QK20 Plant morphology. Plant anatomy / növénymorfológia, -anatómia
QK30 Plant ecology. Plant ethology / növényökológia
QK40 Plant histology / nővényszövettan
Tartalmi leírás:
Water uptake and water use efficiency of poikilochlorophyllous resurrection plants considerably differ from
other vascular plants due to their special ecological adaptation strategies. Histological traits of the living and
dead leaves of desiccation-tolerant Xerophyta scabrida (Pax) Th., Dur. et Schinz. were investigated after safranin
staining to examine the dynamics of rehydration and the process ofwater transport by safranin impregnation differences.
Staining that appeared on the leaf's surface epidermal glands after 30 min of remoistening in living
X. scabrida leaves suggested that glandular complexes could take part in the water uptake from the beginning
of the rehydration process, when the xylemmight not have been filled up, yet. The leaves of living X. scabrida became
fully impregnated faster than the dead leaves: Sclerenchyma staining started from the xylem while dead
X. scabrida leaves were not able to rehydrate fully. The dynamics of rehydration by the orientation of immersing
leaveswas also studied. Leaves immersed into the solution with their base downward became fully impregnated
earlier than the leaves sank into the dye with their apex downward. Faster water supply in the former case might
have been related to the earlier recovery of xylem integrity and the resultant spatially continuous water supply.
The results indicate that the living leaves of desiccation-tolerant X. scabrida were able to uptake significantwater
amount not only (and not primarily) through their vascular tissues but by external water conduction. Due to the
specific binding of safranin to lignifying cell walls and its fast spread from the xylem to the sclerenchymatous
bundle sheaths also confirm the potential role of sclerenchyma in the water movement of leaf tissues.
Nyelv:
magyar
Típus:
Article
PeerReviewed
info:eu-repo/semantics/article
Formátum:
text
Azonosító:
Péli, Evelin Ramóna and Nagy-Déri, Helga and Nagy, Zoltán (2015) Histological study on the leaf rehydration of desiccation-tolerant plant Xerophyta scabrida. SOUTH AFRICAN JOURNAL OF BOTANY (100). pp. 195-202. ISSN 0254-6299
Kapcsolat: